Implantation aid for the use of surface-sensitive implants
The present application relates to an implantation set including a tool or an aid, and at least one bone contact member adapted thereto, therefore a device designed for direct contact with a bone, the bone contact member having a greater hardness in a region intended for contact by the tool or aid than the tool or aid in a region intended for contact with the bone contact member.
1. A medical implantation set comprising a tool and at least one bone contact member which is adapted thereto and is designed as a device for direct contact with a bone, wherein the bone contact member has a greater surface hardness in a region intended for contact by the tool than the tool in a region intended for contact with the bone contact member, wherein the tool is designed as a screwdriver and the bone contact member is designed as a screw forming an implant and matching the bone contact member for screwing into a bone, wherein the screw has a screw head and a thread, wherein the screw head has a tool mount which is geometrically adapted to an outer contour of a tip of the screwdriver, wherein the screw head has a greater hardness at least in a region of the tool mount than at least a part of the tip of the screwdriver provided for contacting the tool mount, and wherein the tool mount has screwdriver tip contact surfaces aligned in a longitudinal direction of the screw, whereas tool mount contact surfaces at the tip of the screwdriver are aligned so as to be inclined between approximately 2.5° to approximately 7.5° relative to the longitudinal direction of the screw.
2. The implantation set according to claim 1 , characterized in that the tool mount is designed as a recess and/or the tool mount has a slot, cross-slot, hexagonal or Torx geometry and the screwdriver at the tip has a matching design.
3. The implantation set according to claim 2 , characterized in that geometries and dimensions of the recess in the screw head and the tip of the screwdriver, which is designed as a projection, are adapted to one another such that a self-retaining effect of the screw on the tip is enforced when the tip engages in the recess.
4. The implantation set according to claim 1 , characterized in that the screw and the screwdriver each have a through-hole.
5. The implantation set according to claim 4 , characterized in that the through-holes of the screw and the screwdriver are of circular cross-section and have a same size in a mutual contact region.
6. The implantation set according to claim 4 , characterized in that the through-hole in the screwdriver has a multi-step design.
7. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a polymer with a Rockwell hardness of R30 to R125, M50 to M200, or E50 to E200.
8. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a polymer with a Shore hardness of 20 Shore A to 100 Shore A, 20 Shore B to 100 Shore B, 20 Shore C to 100 Shore C, or 20 Shore D to 100 Shore D.
9. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a ceramic with a Vickers hardness of 800 to 2000.
10. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a fiber-reinforced material with a Rockwell hardness of R30 to R150, M50 to M250, or E50 to E250.
11. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a polymer with a coating or a surface modification having a Rockwell hardness of R30 to R200, M50 to M300, or E50 to E300.
12. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a polymer with a coating or a surface modification having a Shore hardness of 20 Shore A to 200 Shore A, 20 Shore B to 200 Shore B, 20 Shore C to 200 Shore C, or 20 Shore D to 200 Shore D.
13. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a ceramic with a coating or a surface modification having a Vickers hardness of 800 to 3000.
14. The implantation set according to claim 1 , characterized in that the tip of the screwdriver comprises a fiber-reinforced material with a coating or a surface modification having a Rockwell hardness of R30 to R150, M50 to M250, or E50 to E250.
15. The implantation set according to claim 1 , characterized in that the screw has a Brinell hardness of 70 to 90.
16. The implantation set according to claim 1 , wherein each of the tool mount contact surfaces are inclined between approximately 2.5° to approximately 7.5° relative to the longitudinal direction of the screw.
17. A medical implantation set for direct contact with a bone, comprising:
a screwdriver; and
at least one screw for screwing into the bone;
wherein the screw comprises a tool mount which is geometrically adapted to an outer contour of a tip of the screwdriver;
wherein the screw has a greater hardness at least in a region of the tool mount than at least a part of the tip of the screwdriver provided for contacting the tool mount; and
wherein the tool mount comprises tool mount contact surfaces at the tip of the screwdriver inclined between approximately 2.5° to approximately 7.5° relative to the longitudinal direction of the screw.
18. The medical implantation set of claim 17 , wherein each of the tool mount contact surfaces are inclined between approximately 2.5° to approximately 7.5° relative to the longitudinal direction of the screw.